Re: [foxboro] FXBAIS vs PI OPC Interface

On the I/A side (no matter how your PI tag is configured), your I/A
block does have to be configured a certain way to be able to receive
writes, otherwise it won't accept them.  I don't know if this applies to
all blocks/parameters, but I do know that for an AIN block, IOMOPT must
be 2 to be able to write to the MEAS parameter.  You cannot write to it
with an IOMOPT of 0 or 1.

You also cannot write to the AIN's MEAS parameter if it is connected to
another C:B.P with IOMOPT=3D2 or if it is being set by something else
already.

>> Of course each tag (C:B.P) is configured as read or write on a per
tag basis.
To clarify Jack's comment above, it is the PI tag that is configured as
read from or write to an I/A C:B.P for the OSI side.

Philip Pulas
Golden Eagle Refinery
Tesoro
Martinez, CA

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Jack.Easley@xxxxxxxxxxxx
Sent: Wednesday, June 25, 2008 10:19 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FXBAIS vs PI OPC Interface

None for OSI PI. It's either write enable or no write enable per
interface. Of course each tag (C:B.P) is configured as read or write on
a per tag basis.

Jack Easley

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Theobald, Martin
Sent: Wednesday, June 25, 2008 11:57 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FXBAIS vs PI OPC Interface

For systems that allow OSI PI (or even OPC DA/HDA Clients) to write back
to the I/A Series, what options are there for limiting which
Compound:Block.Parameters that can be written to?

 
 
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